He turned professional on 1 September 2004 and plays on the Sunshine Tour and the Asian Tour. This victory earned him full European Tour membership and propelled Haig into the top 100 of the Official World Golf Rankings. After a poor 2009 season, Haig had to regain his European Tour card at qualifying school.
Haig fared no better in 2010 and lost his card at the end of the season.
Haig announced his retirement from professional golf in November 2011 due to back injuries. In March 2012, Haig announced he would be returning to professional golf and finished T-18 at the Handa Faldo Cambodian Classic on the Asian Tour.
2001 Vodacom Champions (South Africa) European Tour wins (1) Asian Tour wins (2) Sunshine Tour wins (2).